Salvation is from the Lord

Leviticus 23:23-44
Feast Trumpets: (7/1) present an offering made to the Lord by fire.
The new year Festival and first of three festivals in the seventh month.
Day of Atonement: (7/10) present an offering made to the Lord by fire. Deny yourself and do not work. From the evening of the (7/9) until the following evening you are to observe your sabbath.
Feast of Tabernacles: (7/15) last for seven days.Bring offering made to the Lord by fire - the burnt offerings and grain offerings, sacrifices and drink offerings required for each day. Celebrate the festival to the Lord for 7 days. Live in booths so your descendants will know that I had the Israelites live in booths when I brought them out of Egypt.
A perpetual reminder of the nation's tent-dwelling days following the deliverance from Egypt. This feast was later associated with the grape harvest, the vintage.
Why?
Do not forget what God had done on us, his love  and his grace poured on me.
Give thanks to the Lord for my harvest, without the Lord, I can do nothing.
How?
Remember the salvation is from the Lord!